You can use
your finger to interact with the projected screen, just as you
would use an interactive pen. You can use either a pen or your
finger, or use both at the same time.
When performing touch operations with your finger, you
can use two fingers in built-in annotation and whiteboard
modes.
Note: Finger
touch operations may not work correctly with long or artificial
nails, or fingers wearing bandages. If your fingers are too close
together or crossed, or your sleeve or free hand touches the
screen, finger touch may not be recognized. Some operating systems
may not support gestures.